What are your most hated parts about the L.O.T.R movies?

[Neurion]

There are quite a few things PJ did that I'm not overly fond of (turning Fell-Beasts into Ray Harryhausen-esque pteranodons straight out of One Million Years B.C. is one of the absolute worst, right up there with making the Gondorian infantry the disposable, why-do-they-wear-armour-if-it-doesn't-work Stormtrooper cannon-fodder that they come off as), but I think his sins of omission are almost as bad.

I'm quite certain that with a decent trimming of extraneous belching dwarves, pallid Elf-princesses mysterious tied to the Ring, shieldmaidens of Rohan stealing dreams from Ranger captains, surly, phosphorescent ghosts and warg attacks, there would have been room for more actual book material, such as the Knights of Dol Amroth, Imrahil, Beregond, maybe even the Dunedain.

Case in point: Why does Denethor have a sort of assistant named "Irolas"? Why not Hurin of the Keys, or some other actual character from the books?